@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500&family=Syne:wght@500;700;800&display=swap');

*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg:         #0e0e12;
    --surface:    #16161d;
    --surface2:   #1e1e28;
    --border:     rgba(255,255,255,0.07);
    --border-hi:  rgba(255,255,255,0.13);
    --text:       #e2e2e8;
    --muted:      #6e6e80;
    --accent:     #7c6af5;
    --accent-glow:rgba(124,106,245,0.18);
    --green:      #3ddc84;
    --red:        #ff6b6b;
    --yellow:     #f7c948;
    --font-ui:    'Syne', system-ui, sans-serif;
    --font-mono:  'JetBrains Mono', 'Fira Code', monospace;
    --radius:     10px;
    --radius-sm:  6px;
}

html, body {
    height: 100%;
}

body {
    font-family: var(--font-ui);
    background: var(--bg);
    color: var(--text);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    overflow-x: hidden;
}

/* ─── Header ─── */
.site-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 28px;
    border-bottom: 1px solid var(--border);
    background: var(--surface);
    position: sticky;
    top: 0;
    z-index: 10;
}

.brand {
    display: flex;
    align-items: center;
    gap: 9px;
}

.brand-icon {
    font-size: 18px;
    color: var(--accent);
    line-height: 1;
}

.brand-name {
    font-size: 18px;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: #fff;
}

.header-meta {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--muted);
    letter-spacing: 0.04em;
}

/* ─── Layout ─── */
.layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    flex: 1;
    min-height: 0;
}

@media (max-width: 768px) {
    .layout {
        grid-template-columns: 1fr;
    }
}

/* ─── Panels ─── */
.editor-panel,
.output-panel {
    display: flex;
    flex-direction: column;
    min-height: calc(100vh - 53px);
    background: var(--surface);
}

.editor-panel {
    border-right: 1px solid var(--border);
}

/* ─── Toolbar ─── */
.panel-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 16px;
    border-bottom: 1px solid var(--border);
    background: var(--bg);
}

.toolbar-label {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--muted);
    letter-spacing: 0.03em;
}

.toolbar-actions {
    display: flex;
    gap: 4px;
}

.icon-btn {
    background: transparent;
    border: 1px solid transparent;
    color: var(--muted);
    width: 28px;
    height: 28px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.15s, background 0.15s, border-color 0.15s;
}

.icon-btn:hover {
    color: var(--text);
    background: var(--surface2);
    border-color: var(--border);
}

/* ─── CodeMirror ─── */
#editor-wrapper {
    flex: 1;
    overflow: hidden;
}

.CodeMirror {
    font-family: var(--font-mono) !important;
    font-size: 14px;
    line-height: 1.7;
    height: 100%;
    background: var(--surface) !important;
    color: var(--text) !important;
}

.CodeMirror-scroll {
    padding-bottom: 0;
}

.CodeMirror-gutters {
    background: var(--surface) !important;
    border-right: 1px solid var(--border) !important;
    padding-right: 4px;
}

.CodeMirror-linenumber {
    color: var(--muted) !important;
    font-size: 12px;
}

.CodeMirror-cursor {
    border-left: 2px solid var(--accent) !important;
}

.CodeMirror-selected {
    background: var(--accent-glow) !important;
}

/* ─── Run Bar ─── */
.run-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    border-top: 1px solid var(--border);
    background: var(--bg);
}

.shortcut-hint {
    font-size: 12px;
    color: var(--muted);
    display: flex;
    align-items: center;
    gap: 4px;
}

kbd {
    display: inline-block;
    padding: 2px 6px;
    font-family: var(--font-mono);
    font-size: 10px;
    border: 1px solid var(--border-hi);
    border-radius: 4px;
    color: var(--muted);
    background: var(--surface2);
    line-height: 1.5;
}

.run-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 9px 20px;
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    font-family: var(--font-ui);
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    letter-spacing: 0.01em;
    transition: opacity 0.15s, transform 0.1s, box-shadow 0.15s;
    box-shadow: 0 0 0 0 var(--accent-glow);
}

.run-btn:hover {
    opacity: 0.9;
    box-shadow: 0 0 20px var(--accent-glow);
}

.run-btn:active {
    transform: scale(0.97);
}

.run-btn.running,
.run-btn:disabled {
    opacity: 0.55;
    cursor: not-allowed;
    pointer-events: none;
    box-shadow: none;
}

/* ─── Output Area ─── */
#output-area {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    position: relative;
}

.output-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    height: 100%;
    min-height: 200px;
    color: var(--muted);
}

.output-placeholder p {
    font-size: 13px;
    letter-spacing: 0.02em;
}

.output-text {
    font-family: var(--font-mono);
    font-size: 13.5px;
    line-height: 1.75;
    color: var(--green);
    white-space: pre-wrap;
    word-break: break-word;
}

.error-text {
    font-family: var(--font-mono);
    font-size: 13.5px;
    line-height: 1.75;
    color: var(--red);
    white-space: pre-wrap;
    word-break: break-word;
}

/* ─── Input Prompt ─── */
.input-prompt-area {
    margin-top: 16px;
}

.input-prompt-heading {
    font-size: 12px;
    font-weight: 700;
    color: var(--yellow);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 14px;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 14px;
    animation: fadeSlide 0.2s ease;
}

@keyframes fadeSlide {
    from { opacity: 0; transform: translateY(6px); }
    to   { opacity: 1; transform: translateY(0); }
}

.input-group label {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--muted);
}

.user-input {
    width: 100%;
    padding: 9px 12px;
    font-family: var(--font-mono);
    font-size: 13px;
    background: var(--surface2);
    color: var(--text);
    border: 1px solid var(--border-hi);
    border-radius: var(--radius-sm);
    outline: none;
    transition: border-color 0.15s;
}

.user-input:focus {
    border-color: var(--accent);
}

.submit-inputs-btn {
    margin-top: 4px;
    padding: 8px 18px;
    background: transparent;
    border: 1px solid var(--accent);
    color: var(--accent);
    font-family: var(--font-ui);
    font-size: 13px;
    font-weight: 600;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
}

.submit-inputs-btn:hover {
    background: var(--accent);
    color: #fff;
}

/* ─── Status Bar ─── */
.status-bar {
    padding: 8px 16px;
    border-top: 1px solid var(--border);
    background: var(--bg);
}

.status-label {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.05em;
}

.status-idle    { color: var(--muted); }
.status-running { color: var(--yellow); }
.status-success { color: var(--green); }
.status-error   { color: var(--red); }

/* ─── Spinner ─── */
@keyframes spin {
    to { transform: rotate(360deg); }
}

.spinner {
    display: inline-block;
    width: 10px;
    height: 10px;
    border: 1.5px solid var(--muted);
    border-top-color: var(--yellow);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
    margin-right: 6px;
    vertical-align: middle;
}

/* ─── Utility ─── */
.hidden {
    display: none !important;
}

/* ─── Scrollbar ─── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-hi); border-radius: 99px; }
::-webkit-scrollbar-thumb:hover { background: var(--muted); }